[sdiy] tony clark's 8 step envelope

[Tony Clark]

> Gack... so I should just slash my wrists now and
> save waiting ???   :^P

   I'm sure the Pro-BBD group wouldn't mind.  :)
   Well, okay, perhaps there's more than 2 mfgs (I found a third), but I 
still stand by my assertation that the CD4K selection is limited at best.
   One good thing is that as 74xx stuff starts getting obsoleted, it will 
be the higher voltage parts.  Swap in lower voltage equivilants and a 
new regulator and you're pretty much done.  If CD4K gets obsoleted, 
there IS no substitute, lower voltage or no.
   Also, one other major factor in using TTL over CMOS is interfacing the 
logic levels.  I don't like CMOS logic levels as those aren't very 
"synth" friendly.  Most synths don't put out gates high enough to switch 
+15V CMOS (11V per spec sheet), and some put out only 5V gates.  So TTL 
logic levels assures compatibility with pretty much everything out 
there.
   Actually, since I use RTL/DTL interfacing, I can pretty much use any 
type of logic there is, so the point IS rather moot (but it's easier to 
interface A/D converters with TTL anyhoo).

   Cheers,

   Tony

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